I'm using MS Word on my device and one of my colleagues sent me a document, I edited it and tried to resend it to her. But unexpectedly it stopped opening. I reinstalled my office package, but it didn't aid.
In case, you can't know or dig out how to restore corrupted doc...Then I would suggest you visit Google, there I found out one ms word online service - it accepts problem documents from any device. Probably you may find something better or not, just try.